Oar-lock.



T. E. McDERMOTT & J. CAMPBELL.

OAR LOCK.

APPLICATION FILED MAR. 10. 1915. 1,196,962. Patented Sept. 5, 1916.

2 SHEETSSHEET l- 7 J II I I l \l l h ,5 a erma W .5. 5y mil/Q Mme/vim @QWM/ T. E. McDERMOTT & CAMPBELL'. OAR LOCK. APPLICATION FILED MAR. 10, 1915- 1 1 96,9 62 Patented Sept. 5, 1916.

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THOMAS E. MCDERMOTT AND JOHN CAMPBELL, 0F MINNEAPOLIS, MINNESOTA.

' OAR-LOCK.

Specification of Letters Patent.

Patented Sept. 5, 1916.

Application filed March 10, 1915. Serial No. 13,397.

To all whom it may concern Be it known that we, THOMAS E. MODER- MOTT and JOHN CAMPBELL, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Oar-Locks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention has for its object to proviclean extremely high and efiicient oar lock which may be cheaply made from pressed metal. 9 7

Generally stated, the invention consists of novel devices and combination devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view partly in side elevation and partly in vertical section showing the improved oar lock applied to an oar and seated in a press metal socket. Fig. 2 is a detailed view in plan showing a portion of an oar and the oar lock in which it is seated. Fig. 3 is a side elevation of the oar lock. Fig. 4 is an edge elevation of the so-called oar band of the lock showing the same with its sides pressed inward. Fig. 5 is a perspective view showing the oar band stringed out, and Fig. 6 is a horizontal section taken from the line X of Fig. 1.

The car look proper comprises a fork 1, and a stem 2, both of which are integrally formed from pressed metal, preferably from sheet steel. The fork is channel shaped in cross section with the inner surface of the fork slightly rounded in cross section and with the channel on the outside of the fork. The stem 2, is formed by pressing extensions of the side flanges of the fork into semi-cylindrical shape and bringing these semi-cylindrical portions together to form the hollow cylindrical stem shown in the drawings. Approximately at the point where the stem joins with the flanges of the fork it has an enlarged shoulder or outstanding rib. The stem of the ear lock is adapted to be inserted into the usual or any suitable form of socket, but preferably said socket is band.

formed from a. piece of channel shaped pressed steel 3, the web vof which is cut and partly severed, and the partly severed portions 4, are bent to form an approximately cylindrical socket adapted to receive the said oar lock stem.

An oar may be placed directly in the fork cates a thin fiat spring steel bar provided at one end with a lock perforation 6, and at its other end with a latter-ally pressed lock hook, 7. This spring bar 5, is adapted to be readily bent into annular form and to be secured into such form by inter-locking the hook or lug 7 with the lock perforation 6. The band forming bar 5, is provided with projecting studs or trunnions 8, so spaced that when'the band is formed they will project outward from the band at diametrically opposite points. A pliable facing or lining strip 9, of leather, or other suitable pliable material, is secured to one face of the bar 5, so that it forms a liner for the oar band and is adapted to directly engage with the oar 10, when the latter is inserted through the Before the oar is inserted into the said band, however, the trunnions of the band should be inserted into perforations or seats provided therefor in the prongs of the car look yoke 1. This may be easily done by pressing the oar lock band into flattened form, (see Fig. i), and then allowing 1t to expand back to annular form while the trunnions 8, are in position for entrance into their seats in said yoke. After this has been done the oar may be slipped endwise through the band. Obviously, as long as the oar is in the band it will be impossible for the band to flatten, and hence its trunnions will be positively held into locks with the oar lock fork. The car may be turned wlthin the band as required in the feathering stroke and the trunnions support the band and oar for free oscillations in the vertical plane. The oar cannot, of course accidentally jump out of the oar look but can be detached from the car look only by endwlse movement. The car look described has the much deslred qualities of lightness, rigidity, good wearing qualities, small manufacturing cost, and

high efliciency for the purposes had in View.

l/Vhat we claim is 1. A pressed metal oar lock having a fork that is channel shaped in cross section and having extensions from the intermediate portion of its side flanges bent to form the stem thereof.

2. A pressed metal oar lock having a fork that is channel shaped in cross section, .with its flanges turned outward and with the intermediate portion of its flanges having integral extensions bent into approximately semi-cylindrical form, said cylindrical portions forming the stem of the oar lock. p

3. A pressed metal oar lock having a fork that is channel shaped in cross section, with its flanges turned outward and with the intermediate portion of its flanges having integral extensions bent 7 into approximately semi-cylindrical form, said cylindrical portions forming the stem of the oar lock, and the said stem having an outpressed stop shoulder close to the junction thereof with the flanges of said fork.

Copies of this patent may be obtained for five cents each, by addressing the 4:. A combination with the fork of an oar lock, of an oar band made of a spring metal bar bent into annular form and having inter-locked ends and provided with projecting trunnions adapted to be sprung into and out of pivot engagement with seats in said fork.

5. A combination with a pressed metal oar lock, channel shaped in cross section and having trunnion seats in its prongs, of a spring oar band with diametrically projecting trunnions adapted to be sprung into and out of pivot engagement with the seats in the prongs of said oar lock.

6. A pressed metal oar lock socket made from a channeled bar having a portion of its web cut and bent into approximately semi-cylindrical form and adapted to receive the stem of the car lock.

In testimony whereof we affix our signatures in presence of two witnesses.

THOMAS E. MGDERMOTT. JOHN CAMPBELL.

Witnesses:

HARRY D. KILGoRE, F. D. MERCHANT.

Commissioner of Patents,

Washington, D. C. 

